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Revert "drm/amdkfd: Add memory sync before TLB flush on unmap"

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This reverts commit 3be4dca197.

Reason for revert: it causes regressions on several Asics.

Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Eric Huang 2021-07-09 14:51:34 -04:00 committed by Alex Deucher
parent 06055d2e1c
commit f5cc09acec
1 changed files with 3 additions and 20 deletions
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23
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -1566,29 +1566,13 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
i, args->n_devices);
goto unmap_memory_from_gpu_failed;
}
kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
args->n_success = i+1;
}
mutex_unlock(&p->mutex);
err = amdgpu_amdkfd_gpuvm_sync_memory(dev->kgd, (struct kgd_mem *) mem, true);
if (err) {
pr_debug("Sync memory failed, wait interrupted by user signal\n");
goto sync_memory_failed;
}
/* Flush TLBs after waiting for the page table updates to complete */
for (i = 0; i < args->n_devices; i++) {
peer = kfd_device_by_id(devices_arr[i]);
if (WARN_ON_ONCE(!peer))
continue;
peer_pdd = kfd_get_process_device_data(peer, p);
if (WARN_ON_ONCE(!peer_pdd))
continue;
kfd_flush_tlb(peer_pdd, TLB_FLUSH_HEAVYWEIGHT);
}
kfree(devices_arr);
mutex_unlock(&p->mutex);
return 0;
bind_process_to_device_failed:
@ -1596,7 +1580,6 @@ get_mem_obj_from_handle_failed:
unmap_memory_from_gpu_failed:
mutex_unlock(&p->mutex);
copy_from_user_failed:
sync_memory_failed:
kfree(devices_arr);
return err;
}